How much does it cost to get a cracked iPhone screen fixed?

I dropped my phone back in winter and my mom decided that she will finally take me to get it fixed. How much would it cost (it's just the front in a corner) and where can I take it to get it fixed? Would best buy fix it? The last time I cracked my phone, best buy just replaced it, but I THINK it was a one-time thing.

Using airdrop to share music?

I have an iphone 5 and I was wondering hot or if you can use airdrop to share music files? I've tried googling it but I can't find anything

Should I ask her if everything's okay?

On Monday I texted this girl "Was away over the weekend, met your twin as well" but I didn't get a response, so 3 days later I texted "Hey squeak, you'll never guess what happened."

An hour later she replied "What?".

Hours later that night (as I was busy the rest of the day) I texted "Well, I was in a race today alongside a giraffe and a raging lion. Then I realised you had to pay to ride the carousel. Ideas on an escape plan?"

Then within a minute she wrote "Ah it came through from an email, (email address) eh"

I feel like there's something up as it seemed like she dismissed my joke? Although I did update my iPhone and apparently people have had problems where texts are being sent with peoples email addresses.

I ended up replying "Haha, came as an email?" and decided to dismiss that she didn't play along.

Is it worth eventually asking if everything is okay? Over a week ago we were talking fine, but then she started to give me answers like "Maybe" and "Depends", then took 5 days to reply to one of my texts with "Whether I want to or not"

IPhone 5s vs iPhone 5c

I'm wanting an upgrade from my iPhone 4.
What are the differences, pros and cons, and opinions on the new models?
Do both have the finger scan?
Is the 5C just like the iPhone 5 but with color?

My iPhone 3GS won't connect to itunes?

Yeah so hi.
In about July this year, my iPhone 3GS updated while I was sleeping. I didn't even want the update to happen, because I just didn't want to do it.
So it started updating, and when I looked at it, it said to connect it to iTunes.So, I did. And right after it said "Connected to itunes" it started turning off. I have tried this more than once, on different computers as well. I just want to use it.
Could it not be connecting because it's too old? Because it's a 3GS?
Can you please help me try and restore this, because I would really like it back.

Please COMMENT WHAT you THINK BELOW

So we have iPhone(5) iPods(5&4) and androids in our house and everytime any of them r plugged into a wall charger or a car charger or someone else's charger our devices go crazy! They start doing random things like someone else is controlling it! I think there's something wrong with the chargers these day and is curious if anyone else had the same problem.